| Dr. Bruce Mao Zheng Wang is a California state licensed medical doctor, specializing in Gastroenterology. Graduated Magna Cum Laude from UCSF School of Medicine, completed residency training in UCSF Health, and completed the Gastroenterology specialist training at UCSF Health. Dr. Wang currently is working at UCSF Health, located in 513 Parnassus Ave #S357 San Francisco CA 94143 | |||